Model: EWT05EH – Walk-In Oven

DATA SHEET OWNER'S MANUAL REQUEST A QUOTE

Operating Temperature 

150°F (66°C) to 500°F (260°C)

Heating Medium

Electric, low watt density Incoloy® heaters provide years of trouble free service.  Standard heater bank assemblies are installed in high velocity ductwork to maximize heat transfer.

Airflow Pattern

Horizontal Airflow: Hot air is supplied from one side of the wall and pulled across horizontally to the opposite side wall.

Input Voltage

Standard: 480/3/60. Please consult factory for additional options.

Control System

LEWCO’s standard control package includes a single set-point process temperature controller and redundant high-limit controller. Circulation fan(s) and exhaust fan(s) include air proving circuits that are electrically interlocked with the heating circuit. All controls are housed in a NEMA 12 enclosure employing a full voltage lockable disconnect switch. Controls are wired to NFPA 70 and 79 electrical standards in our own UL508A certified panel shop. Independent third party inspections available.

Optional:

Door Switch
Disables heat when door is opened on electrically heated ovens; holds burner at low fire on fuel-fired ovens.

Batch Timer
Infinitely adjustable up to 100 hrs., includes illuminated On/ Off switch to indicate timed operation and audible alarm when time has elapsed.

Ramp/ Soak Controller
Programmable ramp/ soak temperature controller with capability to store different recipes with multiple segments.

Chart Recorder
Single pen circular paper chart recorder for continuous monitoring of temperature data. Comes with (1) Type “J” thermocouple input.

PLC
Programmable Logic Controller for processes with numerous inputs and outputs; or requiring automation of material handling equipment. The PLC can also allow for Ethernet connectivity for remote system monitoring.

Touchscreen HMI
Human Machine Interface provides the operator easy access and control of different parts of the equipment. Allows real time monitoring and provides feedback of the process in a visual, easy to read format.

Composite Curing Controls:

Data Logger: Multiple input digital data logger continuously records temperature and other process data. Allows downloading of digital data files through USB or Ethernet connection. Data can also be viewed on a full color display or on a web server when connected to a network.

Thermocouple Jacks: Thermocouple jack panel for high-temperature Type “J” thermocouples, located inside the oven. Includes wiring to data logger if purchased.

Vacuum Ports: ½” NPT thru-wall vacuum ports, each with vacuum rated manual ball valve and indicating gauge. All ports are connected to a 1” NPT header.

Vacuum Pump: Includes motor starter circuit and connection to vacuum header pipe.

Model (NFPA Class B) Overall Dimensions Door Swing Radius Workspace Dimensions Workspace Volume (cubic ft.) Heater Bank
(kW)		 Circulating Fan
(CFM)		 Motor
(HP)		 Air Changes per Minute Exhaust Fan Capacity (CFM) Exhaust Motor (HP) Solvents per Batch
(Gals.)		 Ships Fully Assembled
“W “D “H “W “D “H
EWT05EH-48-48-60
 87 61 123 34″ 48 48 60 80 45 1,700 1 21.25 N/A N/A 0 Yes
EWT05EH-48-48-72
 91 61 135 34″ 48 48 72 96 45 2,000 1 1/2 20.83 N/A N/A 0 Yes
EWT05EH-48-48-96
 95 61 159 34″ 48 48 96 128 54 2,500 2 19.53 N/A N/A 0 No
EWT05EH-48-72-72
 95 85 136 34″ 48 72 72 144 54 3,000 2 20.83 N/A N/A 0 Yes
EWT05EH-48-72-96
 99 85 163 34″ 48 72 96 192 63 4,000 3 20.83 N/A N/A 0 No
EWT05EH-48-96-72 99 109 139 34″ 48 96 72 192 63 4,000 3 20.83 N/A N/A 0 Yes
EWT05EH-48-96-96 107 109 167 34″ 48 96 96 256 72 5,000 3 19.53 N/A N/A 0 No
EWT05EH-60-60-60
 107 73 123 40″ 60 60 60 125 45 2,500 2 20.00 N/A N/A 0 Yes
EWT05EH-60-60-72
 107 73 136 40″ 60 60 72 150 54 3,000 2 20.00 N/A N/A 0 Yes
EWT05EH-60-60-96 111 73 163 40″ 60 60 96 200 63 4,000 3 20.00 N/A N/A 0 No
EWT05EH-60-72-72
 111 85 136 40″ 60 72 72 180 54 3,500 3 19.44 N/A N/A 0 Yes
EWT05EH-60-72-96 115 85 167 40″ 60 72 96 240 63 4,500 3 18.75 N/A N/A 0 No
EWT05EH-60-96-96 123 109 169 40″ 60 96 96 320 72 6,000 3 18.75 N/A N/A 0 No
EWT05EH-72-72-72
 123 85 139 46″ 72 72 72 216 63 4,000 3 18.52 N/A N/A 0 Yes
EWT05EH-72-72-96 131 85 169 46″ 72 72 96 288 72 5,500 3 19.10 N/A N/A 0 No
EWT05EH-72-96-96 147 109 169 46″ 72 96 96 384 81 8,000 5 20.83 N/A N/A 0 No
EWT05EH-72-120-96
 155 133 169 46″ 72 120 96 480 90 9,000 7 1/2 18.75 N/A N/A 0 No
Model (NFPA Class A) Overall Dimensions Door Swing Radius Workspace Dimensions Workspace Volume (cubic ft.) Heater Bank
(kW)		 Circulating Fan
(CFM)		 Motor
(HP)		 Air Changes per Minute Exhaust Fan Capacity (CFM) Exhaust Motor (HP) Solvents per Batch
(Gals.)		 Ships Fully Assembled
“W “D “H “W “D “H
EWT05EH-48-48-60
 87 61 174 34″ 48 48 60 80 54 1,700 1 21.25 62 1/4 0.05 No
EWT05EH-48-48-72
 91 61 186 34″ 48 48 72 96 54 2,000 1 1/2 20.83 62 1/4 0.05 No
EWT05EH-48-48-96
 95 61 210 34″ 48 48 96 128 63 2,500 2 19.53 62 1/4 0.05 No
EWT05EH-48-72-72
 95 85 187 34″ 48 72 72 144 63 3,000 2 20.83 62 1/4 0.05 No
EWT05EH-48-72-96
 99 85 214 34″ 48 72 96 192 63 4,000 3 20.83 62 1/4 0.05 No
EWT05EH-48-96-72 99 109 190 34″ 48 96 72 192 63 4,000 3 20.83 62 1/4 0.05 No
EWT05EH-48-96-96 107 109 218 34″ 48 96 96 256 72 5,000 3 19.53 62 1/4 0.05 No
EWT05EH-60-60-60
 107 73 174 40″ 60 60 60 125 54 2,500 2 20.00 62 1/4 0.05 No
EWT05EH-60-60-72
 107 73 187 40″ 60 60 72 150 63 3,000 2 20.00 62 1/4 0.05 No
EWT05EH-60-60-96 111 73 214 40″ 60 60 96 200 72 4,000 3 20.00 62 1/4 0.05 No
EWT05EH-60-72-72
 111 85 187 40″ 60 72 72 180 63 3,500 3 19.44 62 1/4 0.05 No
EWT05EH-60-72-96 115 85 218 40″ 60 72 96 240 72 4,500 3 18.75 62 1/4 0.05 No
EWT05EH-60-96-96 123 109 220 40″ 60 96 96 320 90 6,000 3 18.75 100 1/4 0.08 No
EWT05EH-72-72-72
 123 85 190 46″ 72 72 72 216 72 4,000 3 18.52 62 1/4 0.05 No
EWT05EH-72-72-96 131 85 220 46″ 72 72 96 288 81 5,500 3 19.10 62 1/4 0.05 No
EWT05EH-72-96-96 147 109 220 46″ 72 96 96 384 99 8,000 5 20.83 100 1/4 0.08 No
EWT05EH-72-120-96
 155 133 220 46″ 72 120 96 480 108 9,000 7 1/2 18.75 100 1/4 0.08 No

Note: Sizes are approximate. LEWCO, Inc. reserves the right to change specifications without notice.

Standard oven construction includes a 16 gauge aluminized steel interior with a 18 gauge cold rolled steel exterior. Heat loss is minimized by a unique wall design featuring a welded inner shell and a completely isolated outer frame and covers.

Doors

Heavy-duty doors on an isolated door frame minimize heat loss. Wire core gaskets create a tight seal for efficient heating. Standard doors are bi-parting swing at one end and include explosion venting latches.

     Standard Options:

  • Bi-parting swing doors at both ends
  • Vertical lift guillotine door at one or both ends
  • Door windows

Flooring

Standard ovens include a 12 gauge steel plate floor.

     Standard Options:

  • 12 gauge plate floor with (1) pair inverted angle track
  • 12 gauge plate floor with (1) pair 6” wide wheel guides
  • Insulated (100 p.s.f. max)
  • Insulated with (1) pair inverted angle track
  • Insulated with (1) pair 6” wide wheel guides
  • No floor

LEWCO industrial ovens are designed and manufactured to industry standards. Our engineers regularly work to keep updated with the latest revisions in industry codes. If there is a specific industry standard or code compliance that you require for your process heating application, please contact one of our highly knowledgeable applications engineers to learn how LEWCO can help!

About NFPA 86

The National Fire Protection Association’s standard, NFPA 86, documents the guidelines for the safe operation of industrial ovens and furnaces. All LEWCO ovens are designed and manufactured to meet the requirements of this standard. Oven and furnaces in which flammable volatiles or combustible materials are present in the work space are classified by NFPA 86 as “Class A.” Similarly, ovens and furnaces in which no flammable volatiles or combustible materials are present are classified as “Class B.” Due to the risk of fire or explosion, NFPA 86 requires specific safety equipment for all Class A ovens and furnaces. Fuel gas-fired ovens and furnaces also require safety equipment.

  • Powered exhaust of capacity determined by maximum solvent loading.
  • Explosion relief of adequate area determined by oven or furnace workspace volume.

Industry Standards